Augustine of Hippo, on Acts 2:1

“And when the days of the Pentecost were accomplished, they were all together in one place:”

“Fifty days are reckoned from the celebration of the Passover (which, as Moses ordered, was accomplished by slaying the lamb, a type to signify the future passion of the Lord) to the day on which Moses received the law on tablets written by the finger of God. Likewise, when fifty days had passed from the slaying and resurrection of him who was led as a lamb to the slaughter, the finger of God, that is, the Holy Spirit filled the believers gathered in one place.”

Imported from an open dataset — not yet checked against the printed edition.